Compared to other communication methods, ultra short wave communication has its significant characteristics. Ultra short wave communication utilizes line of sight propagation, which is more stable than short wave sky wave propagation. Due to the influence of seasonal and diurnal variations, small antennas can be used with smaller size, simpler structure, and higher gain directional antennas. In this way, transmitters with lower available power have higher frequencies and wider frequency bands, which can be used for multi-channel communication modulation methods such as frequency modulation, resulting in higher signal-to-noise ratios. The communication quality is better than shortwave.